In the aftermath of the MF Global and Peregrine frauds, we discussed ways how protection of brokerage accounts could be improved. I suggested to IB to give customers the option to hold some or all securities in "customer name" instead of "street name". Unfortunately, that feature request was quickly declined as requiring too many inventory tracking tasks and thus being unworkable. Others suggested to "marry" a brokerage account with a FDIC insured bank account and thus for example being able to trade futures at IB while margin assets are enjoying FDIC protection. While I haven't heard any replies from IB to my repeated lobbying on several levels on this issue, I recently found out about this IB web page through a Google search: http://www.interactivebrokers.com/en/?f=/en/software/pdfhighlights/PDF-CustodyAccounts.php "The Custody Account constitutes a tri-party agreement between IB, the custodial bank holding the customer's assets, and the IB customer. Assets at the custodial bank are reflected in the customers IB trading account and used to margin trades." I don't know whether thats a new offer or not, but, at least for institutional accounts, IB seems to offer such a "combined account" now.